Add Om1 lowering with no optimizations

tests_lit/llvm2ice_tests/load.ll

Index: tests_lit/llvm2ice_tests/load.ll
diff --git a/tests_lit/llvm2ice_tests/load.ll b/tests_lit/llvm2ice_tests/load.ll
index 1a1d6a38c8d890e2bb3a2749760b3d967fc1b1e7..6b7b77fcbf7d0779be1091ce9642462667f672da 100644
--- a/tests_lit/llvm2ice_tests/load.ll
+++ b/tests_lit/llvm2ice_tests/load.ll
@@ -1,5 +1,7 @@
-; RUIN: %llvm2ice -verbose inst %s | FileCheck %s
-; RUIN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
+; Simple test of the load instruction.
+
+; RUN: %llvm2ice --verbose inst %s | FileCheck %s
+; RUN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
 ; RUN: %llvm2iceinsts %s | %szdiff %s | FileCheck --check-prefix=DUMP %s
 ; RUN: %llvm2iceinsts --pnacl %s | %szdiff %s \
 ; RUN:                           | FileCheck --check-prefix=DUMP %s
@@ -10,7 +12,8 @@ entry:
   %iv = load i64* %__1, align 1
   ret void
 
-; CHECK:      %__1 = i32 %addr_arg
+; CHECK:       Initial CFG
+; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i64* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
 }
@@ -21,6 +24,7 @@ entry:
   %iv = load i32* %__1, align 1
   ret void
 
+; CHECK:       Initial CFG
 ; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i32* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
@@ -32,6 +36,7 @@ entry:
   %iv = load i16* %__1, align 1
   ret void
 
+; CHECK:       Initial CFG
 ; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i16* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
@@ -43,6 +48,7 @@ entry:
   %iv = load i8* %__1, align 1
   ret void
 
+; CHECK:       Initial CFG
 ; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i8* {{.*}}, align 1
 ; CHECK-NEXT:  ret void